System Manual
45
Fault
Possible Reason
Measures
test reasons, the oil was
not replenished to the
normal oil level in time.
Oil temperature alarm
1. Transformer overload
operation.
Overload
operation may result in a
high oil temperature
alarm.
1. Check if the transformer is
overloaded.
2. The heat dissipation
channel is blocked.
2. Check the transformer heat
dissipation channel for foreign matter
jams.
3. The secondary circuit
causes a false alarm.
3. Check the actual oil temperature of
the transformer to see if it is a false
alarm.
Oil temperature trip
1. The transformer is
overloaded.
1. Check if the transformer oil level is too
low.
2. Internal fault of the
transformer.
2. Check if the temperature sensor is
abnormal.
3.
Transformer
secondary circuit failure.
Long-term
overload
operation will cause the
transformer temperature
to continue to rise,
resulting in overcurrent
and high voltage tripping.
3. Check the load on the transformer.
Check the load through the internal
current meter of the low voltage cabinet.
If the trip occurs due to an overload, it is
recommended to reduce the running
load.
Summary of Contents for MVS6250
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